How will you reduce friction between those machine parts which rub against each other ? Give the simplest method.
Simplest Methods Applicable
1. Lubricating
2. Greasing
3. Oiling
4. Powdering(Boric acid or any other)
5. Polishing
6. Smoothening or reducing irregularities
7. Using parts made up of materials which have less frictional force amongst them.